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Finding the Fourth Proportional to 73,910.10, 110,865.15 and 21,321.30

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Solution

The fourth proportional to 73,910.10, 110,865.15 and 21,321.30 is: 31,981.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,910.10 : 110,865.15 = 21,321.30 : x
  2. Step 2: Convert to fraction form
    73,910.10/110,865.15 = 21,321.30/x
  3. Step 3: Cross multiply
    73,910.10x = 110,865.15 × 21,321.30
  4. Step 4: Simplify right side
    73,910.10x = 2,363,789,122.70
  5. Step 5: Solve for x
    x = 2,363,789,122.70/73,910.10
  6. Step 6: Final answer
    x = 31,981.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.